CVE-2026-53321
Last modified
CVE-2026-53321 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: io_uring/napi: cap busy_poll_to 10 msec Currently there's no cap on the maximum amount of time that napi is allowed to poll if no events are found, which can lead to kernel complaints on a task being stuck as there's no conditional rescheduling done within that loop. Just cap it to 10 msec in total, that's already way above any kind of sane value that will reap any benefits, yet low enough that it's nowhere near being able to trigger preemption complaints.. EPSS estimates a 0.15% chance of exploitation in the next 30 days.
Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/napi: cap busy_poll_to 10 msec Currently there's no cap on the maximum amount of time that napi is allowed to poll if no events are found, which can lead to kernel complaints on a task being stuck as there's no conditional rescheduling done within that loop. Just cap it to 10 msec in total, that's already way above any kind of sane value that will reap any benefits, yet low enough that it's nowhere near being able to trigger preemption complaints.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 6.9, < 6.18.33 | — |
| Linux | Linux Kernel | >= 6.19, < 7.0.10 | — |
| Linux | Linux Kernel | 7.1 | Rc1 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-53321?
How severe is CVE-2026-53321?
How do I fix CVE-2026-53321?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-53316In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53317In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53318In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53319In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-5332A vulnerability was identified in Xiaopi Panel 1.0.0. This v…6.1
- CVE-2026-53320In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53322In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-53323In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53324In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53325In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53326In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-53327In the Linux kernel, the following vulnerability has been re…5.5
Are you affected by CVE-2026-53321?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST